Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando o Sn/Sb (%) for de 13/17 e um Liquidat (c) maior que 283, qual é o solidat (c)?
 ###Tabelas: CREATE TABLE belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949 (belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Type VARCHAR, Fleet numbers VARCHAR, Quantity made INT, Manufacturer VARCHAR, Date made VARCHAR, Date withdrawn VARCHAR) CREATE TABLE current_agr_reactors (current_agr_reactors_id AUTO_INCREMENT PRIMARY KEY, AGR Power Station VARCHAR, Net MWe INT, Construction started INT, Connected to grid INT, Commercial operation INT, Accounting closure date INT) CREATE TABLE alloys_for_mechanical_composition (alloys_for_mechanical_composition_id AUTO_INCREMENT PRIMARY KEY, Sn/Sb (%) VARCHAR, Liquidat (°C) INT, Solidat (°C) INT, Hardness ( Brinell ) INT, Purpose VARCHAR) CREATE TABLE regular_season_and_post-season_games (regular_season_and_post-season_games_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Kicker VARCHAR, Kicking team VARCHAR, Opponent VARCHAR, Yards INT, Result VARCHAR, Game time VARCHAR) CREATE TABLE preliminaries_scores (preliminaries_scores_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, Swimsuit INT, Evening Gown INT, Interview INT, Average INT)  
SELECT SUM Solidat (°C) FROM alloys_for_mechanical_composition WHERE Sn/Sb (%) = 13/17 AND Liquidat (°C) > 283